arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2206.02453gr-qcastro-ph.GA
收藏

MOG中粒子动力学的Hamilton形式

Hamiltonian Formalism for dynamics of particles in MOG

Sohrab Rahvar

摘要:

MOG作为一种改进的引力理论,被设计为用暗物质来代替。在这个理论中,除了度规张量,一个有质量的矢量是一个引力场,其中每个粒子都有一个与惯性质量成正比的电荷,并通过粒子的四速度耦合到矢量场。在这项工作中,我们提出了哈密顿形式的粒子动力学在这个理论。哈密顿形式主义的优点是更好地理解和分析有质量和无质量粒子的动力学。大质量粒子偏离时空的测地线,光子遵循测地线。我们还研究了牛顿和后牛顿制度的粒子动力学观测的目的。哈密顿形式主义的一个重要结果是,虽然在大尺度上的透镜是与观测兼容的,但恒星尺寸透镜的偏转角大于广义相对论。这个结果可以排除这个理论,除非我们引入一种屏蔽机制来改变像恒星这样的致密物体附近的有效引力常量。

英文摘要:

MOG as a modified gravity theory is designed to be replaced with dark matter. In this theory, in addition to the metric tensor, a massive vector is a gravity field where each particle has a charge proportional to the inertial mass and couples to the vector field through the four-velocity of a particle. In this work, we present the Hamiltonian formalism for the dynamics of particles in this theory. The advantage of Hamiltonian formalism is a better understanding and analyzing the dynamics of massive and massless particles. The massive particles deviate from the geodesics of space-time and photons follow the geodesics. We also study the dynamics of particles in the Newtonian and post-Newtonian regimes for observational purposes. An important result of Hamiltonian formalism is that while lensing on large scales is compatible with the observations, however the deflection angle from stellar size lensing is larger than General Relativity. This result can rule out this theory unless we introduce a screening mechanism to change the effective gravitational constant near compact objects like stars.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑